diff --git a/configs/MPC8315ERDB_defconfig b/configs/MPC8315ERDB_defconfig
index 50fa786..4e2b705 100644
--- a/configs/MPC8315ERDB_defconfig
+++ b/configs/MPC8315ERDB_defconfig
@@ -1,4 +1,5 @@
 CONFIG_PPC=y
+# CONFIG_MMC is not set
 CONFIG_MPC83xx=y
 CONFIG_TARGET_MPC8315ERDB=y
 CONFIG_OF_BOARD_SETUP=y